Hillside exposure and stream cut, about 2.5 km west of Nebo, OK (Ordovician of the United States)

Where: Pontotoc County, Oklahoma (34.4° N, 97.0° W: paleocoordinates 22.3° S, 71.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Amplexograptus manitoulinensis graptolite zone, Welling Formation, Maysvillian (450.2 - 449.6 Ma)

• Given as Edenian - Maysvillian, but all other publications make the Welling Maysvillian. Amorphognathus ordovicus zone.

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal; lithified, shelly/skeletal, cherty/siliceous grainstone and rudstone

• well-washed, crinoid-rich grain- to rudstone; cross-bedding; scours between 10-40 cm thick packages

Size class: macrofossils

Reposited in the OU

Primary reference: L. Amati. 2014. Isoteline trilobites of the Viola Group (Ordovician: Oklahoma): systematics and stratigraphic occurrence. Oklahoma Geological Survey Bulletin 151:1-125 [P. Wagner/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 164841: authorized by Pete Wagner, entered by Pete Wagner on 18.12.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Asaphida - Asaphidae
Ectenaspis burkhalteri n. sp.
Ectenaspis burkhalteri n. sp. Amati 2014 trilobite